Most distinguishing features:Highly magnetic. Habit and colour are also indicators.
Industrial/economical uses:Mined for iron. Crushed magnetite also been used as aggregate to make high-density concrete for specialized applications, such as nuclear reactors.
Most distinguishing features:Colour is primary indicator, as well as habit.
Industrial/economical uses:Used as a minor ore of copper and also has ornamental uses due to vivid green colour.
Most distinguishing features:Bronze-yellow colour and habit are indicative. Streak is also helpful.
Industrial/economical uses:Can be used as source of sulfur and iron, but not normally economically valuable.
Most distinguishing features:Colour is best indicator. Greasy feel and luster are good as well, as is its relative softness.
Industrial/economical uses:Primary ore of which molybdenum is mined. Usually alloyed with iron.
Most distinguishing features:Colour and habit are best indicators.
Industrial/economical uses:Used in the electronics industry in the manufacture of capacitors, transistors, insulators and certain window types. Also used as a filler in building materials.